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Re: (elisp)Numbers

From: Eli Zaretskii
Subject: Re: (elisp)Numbers
Date: Fri, 24 Oct 2003 15:38:18 +0200

> From: Richard Stallman <address@hidden>
> Date: Thu, 23 Oct 2003 14:38:07 -0400
>     If you say "gcc -S" and look at the code, don't you see the FSQRT
>     instruction being followed by tests on bits in the FPU status word,
>     followed by the call to `sqrt' from the library?
> i don't see that on the x87 code here.

The DJGPP port of GCC 2.95.3 does produce the code I described.
Perhaps on GNU/Linux, the library and/or the kernel somehow do the
equivalent of it, I don't know enough about GCC configuration on that
platform to tell.

> anyway, it does not signal the exception.
> can someone try to debug this?

I'll try if no one else does.

> also, i compile with -O0.  should that really open-code sqrt?

I tried that on fencepost (they also have GCC 2.95.4 there), and it
didn't open-code sqrt under -O0.

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